illegitimate in WordNet English dictionary

1. the illegitimate offspring of unmarried parents
   bastard  by-blow  love child  illegitimate child  illegitimate  whoreson 
   

1. of marriages and offspring; not recognized as lawful
   illegitimate 
   
2. contrary to or forbidden by law
   "an illegitimate seizure of power"; "illicit trade"; "an outlaw strike"; "unlawful measures"
   illegitimate  illicit  outlaw  outlawed  unlawful